Nanofiltration (NF) Membrane Equipment

‌Overview of Nanofiltration (NF) Membrane Equipment



Nanofiltration (NF) membrane equipment is a highly efficient separation device used for water treatment, positioned between ultrafiltration and reverse osmosis in terms of filtration capabilities. It is primarily used to remove organic compounds, pigments, divalent salts, heavy metal ions, and large molecular contaminants from water. Nanofiltration membranes selectively retain some monovalent salts and small organic molecules while removing larger molecules and divalent ions. Due to its high selectivity, low energy consumption, and broad applicability, NF membrane technology is widely used in industrial and municipal water treatment applications.




Working Principle




Nanofiltration membranes feature "nano-sized pores," making them suitable for the selective removal of small molecular proteins, polysaccharides, and divalent salts, among others. Through the NF separation process, monovalent salts and smaller organic molecules can pass through, while larger molecules and divalent ions are rejected. This allows NF membranes to effectively separate monosaccharides from polysaccharides, as well as monovalent salts from multivalent salts, achieving results that are difficult to reach with conventional methods. Nanofiltration’s unique selectivity makes it ideal for a wide range of industrial applications.

Technical Features




High-Performance Membrane Elements: Core membrane elements are made from premium imported organic membranes. Different configurations are selected based on specific process requirements to ensure optimal retention, flux, and system stability.


Low Operating Pressure: NF systems can achieve desalination and concentration at lower operating pressures, resulting in shorter production cycles, thorough desalination, and products with high purity and consistent quality.

Restorable Performance: After professional cleaning, membrane systems can restore the performance of membrane elements, enhancing the economic practicality of the equipment.

Ambient Temperature Processing: The process operates at ambient temperatures without phase changes, preserving the integrity of heat-sensitive substances and maintaining the active components of the product.

Hygienic Design: The system operates in a fully enclosed pipeline setup, made from sanitary-grade stainless steel, in compliance with GMP standards, ensuring a safe and sanitary working environment.

Integrated Control: High integration in process design, with well-organized layouts and fully automated control. Online monitoring of critical parameters enables real-time system performance tracking.



Application Fields



Pharmaceutical Industry: Desalination and concentration of antibiotic resin extracts; concentration of vitamins.

Acid-Base Recovery: Recovery of acid and alkaline waste liquids from pharmaceutical column washing; recovery of waste acids and bases in the chemical fiber industry.

Mother Liquor Recovery: Removal of impurities from MSG mother liquor and glucose crystallization mother liquor.

Food Industry: Separation and purification of oligosaccharides and starch; fruit juice concentration; plant extract purification.


Amino Acid Processing: Decolorization, impurity removal, concentration, and desalination of amino acids.


Dye Processing: Desalination and concentration, replacing salt and acid precipitation processes.


Water Treatment: Treatment of textile wastewater, reclaimed water reuse, and ultra-pure water production.